The "hump" on the double-action was put there to maintain aim when shooting double-action and it is a disadvantage over the curved grip of a single action when shooting the D.A. single action. Therefore, you may want to consider getting a .44 Mag. in single action. It the idea of a single-action does not appeal to you and you still want a double-action with which to shoot mostly in single-action, then it is likely you want a double-action, "just because" (emotional reason, not logical) and then it does not matter which you choose. Just choose the one that has the most visual appeal for you. Heck, most of our guns are just toys anyway.